Seven secret reports obtained by ABC News have revealed that safety breaches involving silica dust occurred on some of Australia's largest tunnel projects, putting thousands of workers at risk of developing silicosis, a fatal lung disease. The reports, compiled by safety inspectors and internal documents, detail instances where dust monitoring was skipped, respiratory protection was not provided, and exposure limits were repeatedly exceeded.
Silica dust is generated when concrete or rock is cut or ground. Inhaled fine particles scar the lungs over time, leading to irreversible damage. Australia has seen a rise in silicosis cases in recent years, particularly from engineered stone benchtops, but the tunnel industry has largely escaped public scrutiny until now.
Workers on the affected projects included drillers, miners, and labourers, many of whom worked for subcontractors. The reports suggest that some companies prioritised speed over safety, failing to install adequate ventilation or water suppression systems. Union officials say they have raised concerns for years but were ignored.
In response, several contractors have stated they are reviewing the findings and have introduced new dust-control measures. However, health experts warn that any exposure above the legal limit can be dangerous, and that the damage may not show up for decades.
The federal and state governments are now facing pressure to launch an independent inquiry. The construction industry employs hundreds of thousands of Australians, and tunnel projects are crucial for transport infrastructure. But the revelations raise difficult questions about how effectively safety laws are being enforced on the ground.
For affected workers, the news is deeply unsettling. Many are now seeking medical checks and legal advice. The long latency period of silicosis means the full health impact may not be known for years.
What to watch next: The release of the full reports, potential prosecutions, and whether safety standards are tightened across the industry. The public can expect more debate about the balance between delivering infrastructure on time and protecting workers.